Abstract

Composites based on copolyimides derived from alicyclic and aromatic anhydrides (ratio 90 : 10 and 85 : 15 mol %, respectively) and diaminodiphenyl ether, on the one hand, and polyacrylamide, on the other hand, were prepared. The IR spectra of the composites demonstrate formation of hydrogen bonds involving functional groups of the polymers, favoring compatibility of components in the blend. Optimum conditions for preparing composite films based on them with enhanced thermal and mechanical properties were found. The polyacrylamide constituent in the course of heat treatment of the films undergoes partial cross-linking with residual amido acid groups of the copolyimide, which enhances the heat resistance and strength of the composite films as a whole. Films with the tensile strength of 136–178 MPa and elongation of 23–17% were obtained. The composites surpass in the heat resistance the initial unmodified (co)polyimides: the alicyclic polyimide by 13–46°C and the 90: 10 and 85 : 15 copolyimides by 11 and 8°С, respectively.

中文翻译：

---

基于脂环族共聚酰亚胺和聚丙烯酰胺的复合材料

摘要

制备了基于衍生自脂环族和芳族酸酐（分别为90:10和85:15 mol％）和二氨基二苯基醚以及另一方面是聚丙烯酰胺的共聚酰亚胺的复合材料。复合材料的红外光谱证明形成了涉及聚合物官能团的氢键，有利于共混物中各组分的相容性。发现了以其为基础的具有增强的热和机械性能的复合膜的最佳制备条件。在膜的热处理过程中，聚丙烯酰胺成分与共聚酰亚胺的残留酰胺酸基团发生部分交联，从而提高了整个复合膜的耐热性和强度。得到的薄膜的拉伸强度为136–178 MPa，伸长率为23–17％。